UserAgent: Mozilla/5.0 (X11; CrOS x86_64 8530.62.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.70 Safari/537.36
Platform: 8530.62.0 (Official Build) beta-channel chell

Steps to reproduce the problem:
1.Plug HP Docking Station into USB-C port on Chromebook. Observe that hub is working normally by checking whether USB keyboard and USB mouse function properly.
2. Plug Displayport cable into second USB-C port on device. Observe that the monitor and hub work properly, even when in docked mode.
3. Plug Displayport cable into USB-C port in hub. Observe that the monitor no longer recognizes a device plugged in.

What is the expected behavior?

What went wrong?
Monitor does not recognize a device when using a Displayport connection when using the HP Docking Station.

Note that the HDMI cable plugged into the docking station does result in a functioning monitor.

Did this work before? N/A 

Chrome version: 53.0.2785.70  Channel: beta
OS Version: 8530.62.0
Flash Version: Shockwave Flash 22.0 r0

Cable: https://store.google.com/product/usb_type_c_to_displayport_cable

Docking station: http://store.hp.com/us/en/pdp/hp-elite-usb-c-docking-station

Monitor: HP Z24i